JP2003120732A - Ventilated brake disk rotor - Google Patents
Ventilated brake disk rotorInfo
- Publication number
- JP2003120732A JP2003120732A JP2001318874A JP2001318874A JP2003120732A JP 2003120732 A JP2003120732 A JP 2003120732A JP 2001318874 A JP2001318874 A JP 2001318874A JP 2001318874 A JP2001318874 A JP 2001318874A JP 2003120732 A JP2003120732 A JP 2003120732A
- Authority
- JP
- Japan
- Prior art keywords
- sliding plate
- inclined wall
- side sliding
- wall portion
- slide plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車両用ブレーキ装
置の制動要素として機能することになるブレーキディス
クロータに関し、特に通風機能を備えたベンチレーテッ
ド型のブレーキディスクロータの改良に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake disc rotor that functions as a braking element of a vehicle brake device, and more particularly to an improvement of a ventilated brake disc rotor having a ventilation function.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】従来の代
表的なベンチレーテッド型ブレーキディスクロータは、
図６に示すように、車両取付状態で外側に位置すること
になるアウタ側摺動板１０１と内側のインナ側摺動板１
０２との間に冷却用通風路１０３が形成されたディスク
部１００と、そのディスク部１００のうちアウタ側摺動
板１０１の中央部に断面略有底円筒状に一体成形された
取付ボス部１０４とを備えていて、全体としていわゆる
ハット型断面形状のものとして形成されている。2. Description of the Related Art A typical conventional ventilated brake disc rotor is as follows.
As shown in FIG. 6, the outer slide plate 101 and the inner slide plate 1 on the inner side, which are located on the outer side in a vehicle mounted state,
02, a disc portion 100 having a cooling air passage 103 formed therein, and a mounting boss portion 104 integrally formed in the center portion of the outer slide plate 101 of the disc portion 100 in a cylindrical shape having a substantially cross section. And has a so-called hat-shaped cross-sectional shape as a whole.
【０００３】このような従来のベンチレーテッド型ブレ
ーキディスクロータでは、特に車両の高速走行状態で制
動で行った場合、あるいは短時間のうちに制動動作を頻
繁に行った場合に、ブレーキパッドとの摩擦のためにア
ウタ，インナ側の摺動板１０１，１０２が発熱して高温
となることから、双方の摺動板１０１，１０２は取付ボ
ス部１０４に対する根元部を支点として多かれ少なかれ
熱変形（ロータ軸心に対するディスク面の外側へのいわ
ゆる倒れ変形）Ｇを起こすことが知られている。なお、
図６の変形量Ｇは誇張して描いてある。In such a conventional ventilated brake disc rotor, especially when braking is performed in a high-speed running state of the vehicle, or when the braking operation is frequently performed within a short time, a brake pad is formed. Since the outer and inner sliding plates 101, 102 generate heat due to friction and become high in temperature, both sliding plates 101, 102 are more or less thermally deformed with the root of the mounting boss 104 as a fulcrum. It is known to cause so-called tilt deformation (G) to the outside of the disk surface with respect to the axis. In addition,
The deformation amount G in FIG. 6 is exaggeratedly drawn.
【０００４】そして、この熱変形が顕著になると、特に
取付ボス部１０４と直接繋がっているアウタ側の摺動板
１０１に内部応力（熱応力）が発生して、その表面に放
射状のクラック（熱疲労亀裂）が発生することがあるほ
か、ブレーキパッドとの接触が不安定となっていわゆる
ブレーキの効きが変動し、ジャダーが発生しやすくな
る。When this thermal deformation becomes remarkable, internal stress (thermal stress) is generated in the sliding plate 101 on the outer side which is directly connected to the mounting boss 104, and radial cracks (heat) are generated on the surface thereof. In addition to the occurrence of fatigue cracks, contact with the brake pads becomes unstable and the so-called braking effectiveness fluctuates, and judder easily occurs.
【０００５】このようなことから、例えば特開平６−１
２９４５２号公報に記載されているように、取付ボス部
１０４と直接繋がっているアウタ側の摺動板１０１の根
元部に環状の溝部を形成して、上記の熱変形を抑制する
ようにしたものが提案されているが、溝部があるために
かえって取付ボス部１０４に対するアウタ側の摺動板１
０１の根元部に応力集中が生じやすくなる。そのため、
この応力の分散させるためには局部的に厚肉化する必要
があり、ディスクロータ全体の重量が増加することとな
って好ましくない。From the above, for example, Japanese Unexamined Patent Publication No. 6-1
As described in Japanese Patent No. 29452, an annular groove is formed at the root of the outer sliding plate 101 that is directly connected to the mounting boss 104 to suppress the above thermal deformation. However, due to the presence of the groove, the sliding plate 1 on the outer side relative to the mounting boss 104 is rather proposed.
Stress concentration is likely to occur at the root portion of 01. for that reason,
In order to disperse this stress, it is necessary to locally increase the wall thickness, which undesirably increases the weight of the entire disc rotor.
【０００６】本発明はこのような課題に着目してなされ
たものであり、とりわけ摺動板の発熱に伴う熱変形やク
ラックの発生を抑制しつつ摺動板の根元部での応力集中
を回避して、全体として熱的強度に優れた軽量なブレー
キディスクロータを提供しようとするものである。The present invention has been made by paying attention to such a problem, and in particular, stress concentration at the root portion of the sliding plate is avoided while suppressing thermal deformation and cracking due to heat generation of the sliding plate. Then, it is intended to provide a lightweight brake disc rotor excellent in thermal strength as a whole.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載の発明
は、アウタ側摺動板とインナ側摺動板との対向間隙内に
冷却用通風路が形成されたディスク部と、そのディスク
部のうちアウタ側摺動板の中央部に取付座部と筒状の胴
部とをもって断面略有底円筒状に一体成形された取付ボ
ス部と、を備えたベンチレーテッド型ブレーキディスク
ロータにおいて、上記取付ボス部の胴部とアウタ側摺動
板との連結部に、その胴部側からアウタ側摺動板に向か
って下り勾配となる内側傾斜壁部とアウタ側摺動板から
胴部側に向かって同じく下り勾配となる外側傾斜壁部と
をもって断面Ｖ字状のネック部を形成するとともに、そ
のネック部の外側頂部がアウタ側摺動板とインナ側摺動
板との対向間隙内に位置するように設定したことを特徴
としている。According to a first aspect of the present invention, there is provided a disk portion in which a cooling air passage is formed in a facing gap between the outer sliding plate and the inner sliding plate, and the disk portion. In a ventilated brake disc rotor including a mounting boss portion integrally formed in a cylindrical shape having a cross section with a mounting seat portion and a tubular body portion in the central portion of the outer side sliding plate, At the connecting portion between the body portion of the mounting boss portion and the outer side sliding plate, the inner sloped wall portion and the outer side sliding plate to the body portion side are inclined downward from the body portion side to the outer side sliding plate. A neck portion having a V-shaped cross section is formed with an outer slanted wall portion that also has a downward slope toward, and the outer top portion of the neck portion is located in the facing gap between the outer slide plate and the inner slide plate. It is characterized by being set to be located.
【０００８】この場合において、摺動板の熱変形抑制効
果を一段と高めるためには、請求項２に記載のように、
上記胴部と内側傾斜壁部とのなす角度および上記アウタ
側摺動板と外側傾斜壁部となす角度が共に２０〜３５°
の範囲内であって、且つ上記アウタ側摺動板を基準とし
たときのネック部における外側頂部の突出量が、アウタ
側摺動板とインナ側摺動板とのなす対向間隙の１／１０
〜７／１０の範囲内に設定されていることが望ましい。In this case, in order to further enhance the effect of suppressing the thermal deformation of the sliding plate, as described in claim 2,
The angle formed by the body portion and the inner inclined wall portion and the angle formed by the outer side sliding plate and the outer inclined wall portion are both 20 to 35 °.
And the amount of protrusion of the outer apex at the neck portion based on the outer slide plate is 1/10 of the facing gap formed by the outer slide plate and the inner slide plate.
It is desirable to be set within the range of 7/10.
【０００９】さらに、請求項３に記載のように、上記胴
部と内側傾斜壁部とのなす屈曲部と上記アウタ側摺動板
と外側傾斜壁部となす屈曲部とが、胴部の軸心方向にお
いて互いにオフセットしていることが望ましい。Further, as described in claim 3, the bending portion formed by the body portion and the inner inclined wall portion, and the bending portion formed by the outer side sliding plate and the outer inclined wall portion are the shafts of the body portion. It is desirable that they are offset from each other in the axial direction.
【００１０】したがって、本発明では、取付ボス部側の
胴部とアウタ側摺動板との間に断面Ｖ字状のネック部が
介在していることによって、胴部に対するアウタ側摺動
板の連結には、アウタ側摺動板と外側傾斜壁部となす屈
曲部と、ネック部自体の屈曲部すなわち外側傾斜壁部と
内側傾斜壁部とのなす屈曲部のほか、胴部と内側傾斜壁
部とのなす屈曲部の合計三つの屈曲部が関与しているこ
とになる。そして、これらの三つの屈曲部のうち少なく
とも二つの屈曲部では熱変形時の挙動が方向的に互いに
逆方向もしくは反転したものとなることによって、その
二つの屈曲部での熱変形が互いに相殺されるようなかた
ちとなって、全体としての熱変形が抑制されることにな
る。Therefore, according to the present invention, the neck portion having a V-shaped cross section is interposed between the body portion on the mounting boss side and the outer side sliding plate, so that the outer side sliding plate with respect to the body portion is The connection includes not only the bent portion formed by the outer slide plate and the outer inclined wall portion, the bent portion formed by the neck portion, that is, the bent portion formed by the outer inclined wall portion and the inner inclined wall portion, but also the body portion and the inner inclined wall portion. This means that a total of three bends, which are the bends formed by the parts, are involved. Then, at least two of the three bent portions have the behaviors during thermal deformation that are directionally opposite or reversed, so that the thermal deformations at the two bent portions cancel each other out. As a result, the overall thermal deformation is suppressed.
【００１１】その上、各屈曲部ではとかく応力集中が起
こりがちであるが、三つの屈曲部に応力が分散されるこ
とになるのでその応力集中による強度低下を招くことが
なく、逆に胴部に対するアウタ側摺動板の連結強度が向
上することになる。そして、請求項３に記載のように胴
部と内側傾斜壁部とのなす屈曲部とアウタ側摺動板と外
側傾斜壁部となす屈曲部とが胴部の軸心方向において互
いにオフセットしていると、双方の屈曲部が同一平面上
に位置しなくなる故に上記の連結強度の向上効果が一段
と顕著となる。Moreover, stress concentration tends to occur at any bent portion, but since stress is dispersed at the three bent portions, the strength is not reduced due to the stress concentration, and conversely, the body portion is conversely reduced. The connecting strength of the outer side sliding plate with respect to is improved. Further, as described in claim 3, the bent portion formed by the body portion and the inner inclined wall portion, and the bent portion formed by the outer slide plate and the outer inclined wall portion are offset from each other in the axial direction of the body portion. If so, since both bent portions are not located on the same plane, the above-described effect of improving the connection strength becomes more remarkable.
【００１２】[0012]
【発明の効果】請求項１，２に記載の発明によれば、取
付ボス部側の胴部とアウタ側摺動板との間に断面略Ｖ字
状のネック部が介在しているため、摺動板の熱変形が抑
制されるのに伴い内部応力が小さくなるとともにクラッ
クの発生もなくなり、さらには重量増加を招くことなく
取付ボス部に対する摺動板の連結強度も向上する。その
結果、ブレーキディスクロータの耐久性向上と併せて、
ブレーキパッドとの当接状態が安定化するとともにジャ
ダーの発生のおそれもなくなり、ブレーキ性能の向上に
貢献できる。According to the invention described in claims 1 and 2, since the neck portion having a substantially V-shaped cross section is interposed between the body portion on the mounting boss side and the outer side sliding plate, As the thermal deformation of the sliding plate is suppressed, the internal stress is reduced and the generation of cracks is eliminated, and further, the connecting strength of the sliding plate to the mounting boss portion is improved without increasing the weight. As a result, in addition to improving the durability of the brake disc rotor,
The contact state with the brake pad is stabilized, the risk of judder is eliminated, and the braking performance can be improved.
【００１３】また、請求項３に記載の発明によれば、取
付ボス部側の胴部と内側傾斜壁部とのなす屈曲部と、ア
ウタ側摺動板と外側傾斜壁部となす屈曲部とが、胴部の
軸心方向において互いにオフセットしているため、先に
述べた応力集中の回避効果と連結強度の向上効果が一段
と顕著となる利点がある。According to the third aspect of the invention, the bent portion formed by the body portion on the mounting boss side and the inner inclined wall portion, and the bent portion formed by the outer slide plate and the outer inclined wall portion. However, since they are offset from each other in the axial direction of the body, there is an advantage that the effect of avoiding the stress concentration and the effect of improving the coupling strength described above become more remarkable.
【００１４】[0014]
【発明の実施の形態】図１は本発明に係るベンチレーテ
ッド型ブレーキディスクロータの好ましい実施の形態を
示している。1 shows a preferred embodiment of a ventilated brake disc rotor according to the present invention.
【００１５】同図（Ａ），（Ｂ）に示すように、鋳鉄材
料にて形成されたブレーキディスクロータ１は、車両取
付時に外側に位置することになるアウタ側摺動板２とそ
の内側に所定距離隔てて位置することになるインナ側摺
動板３とをもって形成されたディスク部４と、そのディ
スク部４におけるアウタ側摺動板２の中央部に断面略有
底円筒状をなすようにこれと一体に膨出形成された取付
ボス部５とで構成される。As shown in FIGS. 1A and 1B, a brake disc rotor 1 formed of a cast iron material has an outer sliding plate 2 and an inner sliding plate 2 which are located outside when mounted on a vehicle. A disc portion 4 formed with an inner side sliding plate 3 which is located at a predetermined distance and a central portion of the outer side sliding plate 2 in the disc portion 4 has a substantially bottomed cylindrical shape in cross section. It is configured with the mounting boss portion 5 which is integrally formed with the boss portion.
【００１６】アウタ側摺動板２とインナ側摺動板３との
間には多数の隔壁６が放射状に形成されていて、双方の
摺動板２，３と各隔壁６とで囲まれた空間がそれぞれに
通風路であるベンチホール７として機能するようになっ
ている。A large number of partition walls 6 are radially formed between the outer sliding plate 2 and the inner sliding plate 3, and are surrounded by both sliding plates 2 and 3 and each partition wall 6. Each space functions as a ventilating bench hole 7.
【００１７】また、取付ボス部５は、取付座部８と筒状
の胴部９とをもって断面略有底円筒状のものとして形成
されていて、ブレーキディスクロータ１全体としては、
上記アウタ側摺動板２とインナ側摺動板３および取付ボ
ス部５とを含むかたちで断面略ハット型形状のものとし
て形成されている。The mounting boss portion 5 is formed as a cylindrical body having a substantially cross section with a mounting seat portion 8 and a cylindrical body portion 9, and the brake disc rotor 1 as a whole is
The outer slide plate 2, the inner slide plate 3 and the mounting boss portion 5 are formed to have a substantially hat-shaped cross section.
【００１８】そして、上記取付ボス部５のうち取付座部
８の最も外側の面に図示しないロードホイールが着座す
るようになっていて、取付座部８のボルト穴１０には図
示しないハブボルトが挿入されることから、ハブボルト
とこれに螺合するホイールナットとをもってロードホイ
ールが取付座部８とともに車軸側のハブに共締め固定さ
れることになる。A road wheel (not shown) is seated on the outermost surface of the mounting seat portion 8 of the mounting boss portion 5, and a hub bolt (not shown) is inserted into the bolt hole 10 of the mounting seat portion 8. Therefore, the road wheel is fastened together with the mounting seat 8 to the hub on the axle side by the hub bolt and the wheel nut screwed to the hub bolt.
【００１９】図２は図１の（Ａ）の要部を拡大した図で
あって、取付ボス部５側の胴部９とアウタ側摺動板２と
の間には断面形状がＶ字状をなすネック部１１が形成さ
れていて、このネック部１１を介してアウタ側摺動板２
が取付ボス部５側の胴部９の端部に一体的に連結されて
いる。より詳しくは、ネック部１１は、胴部９側からア
ウタ側摺動板２に向かって下り勾配となる内側傾斜壁部
１２と逆にアウタ側摺動板２から胴部９側に向かって下
り勾配となる外側傾斜壁部１３とをもって断面Ｖ字状に
形成されているものであり、内側傾斜壁部１２の端部が
所定角度α１をもって胴部９に、外側傾斜壁部１３の端
部が所定角度α２をもってアウタ側摺動板２にそれぞれ
連結されている。FIG. 2 is an enlarged view of the main part of FIG. 1A, in which a V-shaped cross section is formed between the body 9 on the mounting boss 5 side and the outer sliding plate 2. The neck portion 11 forming the outer side sliding plate 2 is formed through the neck portion 11.
Is integrally connected to the end portion of the body portion 9 on the mounting boss portion 5 side. More specifically, the neck portion 11 descends from the outer side sliding plate 2 toward the body portion 9 side, contrary to the inner inclined wall portion 12 having a downward slope from the body portion 9 side toward the outer side sliding plate 2. It is formed in a V-shaped cross-section with the sloped outer inclined wall portion 13, and the end portion of the inner inclined wall portion 12 is at the body portion 9 at a predetermined angle α1 and the end portion of the outer inclined wall portion 13 is at the predetermined angle α1. The outer sliding plates 2 are connected to each other at a predetermined angle α2.
【００２０】そして、上記角度α１とα２は共に例えば
２０〜３５°の範囲のものとなるように設定されてい
て、なおかつ胴部９と内側傾斜壁部１２とのなす屈曲部
（連結コーナー部もしくは交差部）１４と、アウタ側摺
動板２と外側傾斜壁部１３とのなす屈曲部１５は、胴部
９の軸心方向において互いに所定量βだけオフセットし
ていて、実質的に双方の屈曲部１４，１５が同一平面上
に位置しないように考慮されている。The angles α1 and α2 are both set to fall within the range of 20 to 35 °, for example, and the bent portion (connecting corner portion or the inner corner wall portion 12) formed by the body portion 9 and the inner inclined wall portion 12 is formed. The intersecting portion 14 and the bending portion 15 formed by the outer sliding plate 2 and the outer inclined wall portion 13 are offset from each other by a predetermined amount β in the axial direction of the body portion 9, and substantially both bending portions are bent. It is considered that the parts 14 and 15 are not located on the same plane.
【００２１】また、凸形状となるネック部１１の外側頂
部は平坦面をもって形成されていて、この頂部平坦面１
６がアウタ側摺動板２とインナ側摺動板３との間に位置
するように設定されている。ここでは、アウタ側摺動板
２を基準としたときの頂部平坦面１６の突出量をＣと
し、そのアウタ側摺動板２とインナ側摺動板３とのなす
対向間隙すなわちベンチホール７の厚み寸法をＤとした
とき、頂部平坦面１６の突出量Ｃは例えば対向間隙Ｄの
１／１０〜７／１０程度のものとなるように設定されて
いる。The outer top of the convex neck portion 11 is formed with a flat surface.
6 is set to be located between the outer slide plate 2 and the inner slide plate 3. Here, the protrusion amount of the top flat surface 16 with reference to the outer slide plate 2 is C, and the facing gap formed by the outer slide plate 2 and the inner slide plate 3, that is, the bench hole 7. When the thickness dimension is D, the protrusion amount C of the top flat surface 16 is set to be, for example, about 1/10 to 7/10 of the facing gap D.
【００２２】したがって、以上のように構成されたベン
チレーテッド型ブレーキディスクロータ１によれば、制
動時にブレーキパッドとの摩擦熱によって特にアウタ側
摺動板２およびインナ側摺動板３が昇温，発熱すること
から、それに伴い従来と同様にアウタ側摺動板２および
インナ側摺動板３が取付ボス部５との連結部を支点とし
て熱変形すなわちアウタ側摺動板２の方向に倒れを生じ
ようとする。Therefore, according to the ventilated type brake disc rotor 1 constructed as described above, the outer side sliding plate 2 and the inner side sliding plate 3 are heated by frictional heat with the brake pad during braking. Since heat is generated, the outer side sliding plate 2 and the inner side sliding plate 3 are thermally deformed, that is, fall in the direction of the outer side sliding plate 2 with the connecting portion with the mounting boss portion 5 as a fulcrum. Try to cause.
【００２３】その一方、本実施の形態では、取付ボス部
５側の胴部９とアウタ側摺動板２との間に断面Ｖ字状の
ネック部１１が介在しているため、胴部９に対するアウ
タ側摺動板２の連結には、アウタ側摺動板２と外側傾斜
壁部１３となす屈曲部１５と、ネック部１１自体の屈曲
部すなわち外側傾斜壁部１３と内側傾斜壁部１２とのな
す屈曲部１７のほか、胴部９と内側傾斜壁部１２とのな
す屈曲部１４の合計三つの屈曲部１４，１５，１７が関
与していることになる。そして、これらの三つの屈曲部
１４，１５，１７のうち少なくとも二つの屈曲部では熱
変形時の挙動が方向的に互いに逆方向もしくは反転した
ものとなることから、実質的にその二つの屈曲部での熱
変形が互いに相殺されるようなかたちとなり、もって双
方の摺動板２，３全体としての熱変形が抑制されること
になる。On the other hand, in this embodiment, since the neck portion 11 having a V-shaped cross section is interposed between the body portion 9 on the mounting boss portion 5 side and the outer side sliding plate 2, the body portion 9 is formed. The outer side slide plate 2 is connected to the outer side slide plate 2 by a bent portion 15 formed by the outer side slide plate 2 and the outer inclined wall portion 13, and a bent portion of the neck portion 11 itself, that is, the outer inclined wall portion 13 and the inner inclined wall portion 12. In addition to the bent portion 17 formed by and, a total of three bent portions 14, 15, 17 of the bent portion 14 formed by the body portion 9 and the inner inclined wall portion 12 are involved. Then, at least two of the three bent portions 14, 15, and 17 have behaviors at the time of thermal deformation that are directionally opposite to each other or reversed, so that the two bent portions are substantially the same. In this way, the thermal deformations of the two sliding plates 2 and 3 as a whole are suppressed.
【００２４】しかも、各屈曲部１４，１５，１７では形
状的にとかく応力集中が起こりやすい傾向となるもの
の、三つの屈曲部１４，１５，１７に応力が分散される
ことになるのでその応力集中による強度低下を招くこと
がない。特に本実施の形態では、胴部９と内側傾斜壁部
１２とのなす屈曲部１４とアウタ側摺動板２と外側傾斜
壁部１３となす屈曲部１５とが胴部９の軸心方向におい
て互いにオフセットしていて、双方の屈曲部１４，１５
が同一平面上に位置しないように配慮されているため、
むしろ胴部９に対するアウタ側摺動板２の連結強度が向
上することになる。In addition, although the stress concentration tends to occur easily in each of the bent portions 14, 15, and 17, the stress is concentrated in the three bent portions 14, 15, and 17, so that the stress concentration tends to occur. There is no reduction in strength due to. Particularly in the present embodiment, the bent portion 14 formed by the body portion 9 and the inner inclined wall portion 12, and the bent portion 15 formed by the outer side sliding plate 2 and the outer inclined wall portion 13 are arranged in the axial direction of the body portion 9. They are offset from each other and both bends 14, 15
Is designed so that they are not on the same plane,
Rather, the connection strength of the outer slide plate 2 to the body 9 is improved.
【００２５】図３はブレーキディスクロータにおける摺
動板の温度と熱変形（倒れ量）との関係を示す図であ
り、実線が上記の実施の形態のもの（本発明品）の特性
を、破線が従来のものの特性をそれぞれ示している。同
図から明らかなように、従来のものと比べて本発明のも
のの方が温度上昇に応じた倒れ量が減少している。FIG. 3 is a diagram showing the relationship between the temperature of the sliding plate in the brake disc rotor and the thermal deformation (the amount of tilt), in which the solid line shows the characteristics of the above-mentioned embodiment (product of the present invention). Shows the characteristics of the conventional one. As is clear from the figure, the amount of tilting according to the temperature increase is smaller in the present invention than in the conventional one.
【００２６】また、図４は摺動面上でのブレーキディス
クロータの中心からの距離と熱応力との関係を示す図で
あり（摺動面の温度は５０°）、上記と同様に実線が上
記の実施の形態のもの（本発明品）の特性を、破線が従
来のものの特性をそれぞれ示している。同図に示すよう
に、従来品および本発明品共にほぼ同じ位置からその負
の応力すなわち圧縮応力が発生するものの、従来のもの
と比べて本発明のものの方がその圧縮応力が明らかに減
少している。これは、熱応力の発生を原因とするクラッ
クすなわち熱疲労亀裂を防止する上で本発明のものの方
が著しく優れていることを意味する。FIG. 4 is a diagram showing the relationship between the distance from the center of the brake disc rotor and the thermal stress on the sliding surface (the temperature of the sliding surface is 50 °), and the solid line is the same as above. The characteristics of the above-described embodiment (invention product) and the characteristics of the conventional one are indicated by broken lines. As shown in the figure, the negative stress, that is, the compressive stress is generated from almost the same position in both the conventional product and the product of the present invention, but the compressive stress of the present invention is clearly reduced as compared with the conventional product. ing. This means that the present invention is significantly superior in preventing cracks caused by the generation of thermal stress, that is, thermal fatigue cracks.
【００２７】図５は本発明に係るブレーキディスクロー
タ１の第２の実施の形態を示す図で、ネック部１１の外
側頂部２６を所定曲率の曲面をもって形成した点で第１
の実施の形態のものと異なっている。本実施の形態にお
いても第１の実施の形態のものと全く同様の機能が発揮
されることになる。FIG. 5 is a view showing a second embodiment of the brake disc rotor 1 according to the present invention, which is the first one in that the outer top 26 of the neck 11 is formed to have a curved surface with a predetermined curvature.
Is different from that of the embodiment. Also in this embodiment, the same functions as those of the first embodiment are exerted.
【図１】本発明に係るベンチレーテッド型ブレーキディ
スクロータの好ましい実施の形態を示す図で、（Ａ）は
同図（Ｂ）のａ−ａ線に沿う断面図、（Ｂ）は正面説明
図。FIG. 1 is a view showing a preferred embodiment of a ventilated brake disc rotor according to the present invention, where (A) is a sectional view taken along the line aa in FIG. 1 (B) and (B) is a front view. Fig.
【図２】図１の（Ａ）の要部拡大図。FIG. 2 is an enlarged view of a main part of FIG.
【図３】摺動板における温度と熱変形との関係を示す特
性図。FIG. 3 is a characteristic diagram showing a relationship between temperature and thermal deformation in a sliding plate.
【図４】摺動板上の位置と熱応力との関係を示す特性
図。FIG. 4 is a characteristic diagram showing a relationship between a position on a sliding plate and thermal stress.
【図５】本発明に係るベンチレーテッド型ブレーキディ
スクロータの第２の実施の形態を示す要部拡大断面図。FIG. 5 is an enlarged cross-sectional view of a main part showing a second embodiment of a ventilated brake disc rotor according to the present invention.
【図６】従来のベンチレーテッド型ブレーキディスクロ
ータの要部の構成を示す要部断面図。FIG. 6 is a cross-sectional view of a main part showing a configuration of a main part of a conventional ventilated brake disc rotor.
１…ベンチレーテッド型ブレーキディスクロータ ２…アウタ側摺動板 ３…インナ側摺動板 ４…ディスク部 ５…取付ボス部 ７…ベンチホール（冷却用通風路） ８…取付座部 ９…胴部 １１…ネック部 １２…内側傾斜壁部 １３…外側傾斜壁部 １４…屈曲部 １５…屈曲部 １６…頂部平坦面（外側頂部） １７…屈曲部 ２６…外側頂部 1. Ventilated brake disc rotor 2 Outer side sliding plate 3 Inner slide plate 4 ... Disk part 5 ... Mounting boss 7 ... Bench hall (cooling ventilation passage) 8 ... Mounting part 9 ... Body 11 ... Neck 12 ... Inclined wall part 13 ... Outer inclined wall portion 14 ... Bent 15 ... Bent 16 ... Top flat surface (outer top) 17 ... Bent 26 ... Outer top
Claims (3)
向間隙内に冷却用通風路が形成されたディスク部と、そ
のディスク部のうちアウタ側摺動板の中央部に取付座部
と筒状の胴部とをもって断面略有底円筒状に一体成形さ
れた取付ボス部と、を備えたベンチレーテッド型ブレー
キディスクロータにおいて、 上記取付ボス部の胴部とアウタ側摺動板との連結部に、
その胴部側からアウタ側摺動板に向かって下り勾配とな
る内側傾斜壁部とアウタ側摺動板から胴部側に向かって
同じく下り勾配となる外側傾斜壁部とをもって断面Ｖ字
状のネック部を形成するとともに、 そのネック部の外側頂部がアウタ側摺動板とインナ側摺
動板との対向間隙内に位置するように設定したことを特
徴とするベンチレーテッド型ブレーキディスクロータ。1. A disk portion in which a cooling air passage is formed in a facing gap between an outer side sliding plate and an inner side sliding plate, and a mounting seat at a central portion of the outer side sliding plate of the disk part. And a tubular body portion, the mounting boss portion integrally formed in a cylindrical shape having a substantially cross-section in cross section, in a ventilated brake disc rotor, wherein the body portion of the mounting boss portion and the outer sliding plate In the connection part with
It has a V-shaped cross section with an inner inclined wall portion having a downward slope from the body portion side toward the outer side sliding plate and an outer inclined wall portion having a similar downward slope from the outer side slide plate toward the body portion side. A ventilated brake disc rotor, characterized in that a neck portion is formed and an outer top portion of the neck portion is set in a facing gap between an outer slide plate and an inner slide plate.
よび上記アウタ側摺動板と外側傾斜壁部となす角度が共
に２０〜３５°の範囲内に設定されているとともに、 上記アウタ側摺動板を基準としたときのネック部におけ
る外側頂部の突出量が、アウタ側摺動板とインナ側摺動
板とのなす対向間隙の１／１０〜７／１０の範囲内に設
定されていることを特徴とするベンチレーテッド型ブレ
ーキディスクロータ。2. The angle formed by the body and the inner inclined wall portion and the angle formed by the outer slide plate and the outer inclined wall portion are both set within a range of 20 to 35 °, and the outer portion is formed. The amount of protrusion of the outer top portion of the neck portion based on the side sliding plate is set within the range of 1/10 to 7/10 of the facing gap formed by the outer side sliding plate and the inner side sliding plate. The ventilated brake disc rotor is characterized by:
と上記アウタ側摺動板と外側傾斜壁部となす屈曲部と
が、胴部の軸心方向において互いにオフセットしている
ことを特徴とする請求項１または２に記載のベンチレー
テッド型ブレーキディスクロータ。3. The bent portion formed by the body and the inner inclined wall portion and the bent portion formed by the outer slide plate and the outer inclined wall portion are offset from each other in the axial direction of the body portion. The ventilated brake disc rotor according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001318874A JP2003120732A (en) | 2001-10-17 | 2001-10-17 | Ventilated brake disk rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001318874A JP2003120732A (en) | 2001-10-17 | 2001-10-17 | Ventilated brake disk rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003120732A true JP2003120732A (en) | 2003-04-23 |
Family
ID=19136501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001318874A Pending JP2003120732A (en) | 2001-10-17 | 2001-10-17 | Ventilated brake disk rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003120732A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007320417A (en) * | 2006-05-31 | 2007-12-13 | Jtekt Corp | Hub unit |
| CN106523555A (en) * | 2016-12-30 | 2017-03-22 | 万向钱潮（上海）汽车***有限公司 | Brake disc and brake |
-
2001
- 2001-10-17 JP JP2001318874A patent/JP2003120732A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007320417A (en) * | 2006-05-31 | 2007-12-13 | Jtekt Corp | Hub unit |
| CN106523555A (en) * | 2016-12-30 | 2017-03-22 | 万向钱潮（上海）汽车***有限公司 | Brake disc and brake |
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